frensdorf



H, R. FRENSDORF GUN SIGHT.

APPUCAHON man OCT. 19. ms.

u Patented June 24, 1919.

R. YE'REN 533K531, 0F 3.111 113331511 1; D TISCDNSIN.

' GUILSI LSUTAML Specification of Letters Pitent.

li ntcnted June 2st,

Application filed oetnber 19. 1918. Serial No.

T 0 (ZZZ whom it may concern:

Be it known that I, HERMAN R. Flanne- DORF, a citizen of. the United States, and resi dent of Kimberly. in the county oi {hitsgmnie and State of Wisconsin, have in'ented new and useful Improvements in Gun Sights, of which the following is a deserio tion, reference being had to the accompanying drawings, which are a part of this specification.

The invention relates to gun sights fully described and explained in the i ing specification and shown in theac panying drawings in which:

Figure 1 is a view of a gun barrel pro vided with sights embodying the invention, parts being shown in section and parts being broken away; Fi 2, is a rear view oi the rear sight; Fig. 3 is a plan view of the rear sighting member; Fig. 4: is a detail view of the rear sight, parts being broken away; Fig. 5 is a section taken on the line 5P of Fig. 1; Fig. 6 is a plan view of the front sight; Fig. 7 is a rear view of the front sight; Fig. 8 is a view of the sighting members in sighting position.

The rear sight consists of a. base member 5) having sides 10 either formed with or joined to the part 1.1 which is attached to the gun barrel l2 and having a spring leaf portion 13 having its sides i i; spaced from the sides l0 and its outer end 15 spaced from the end portion 15. The sides 10 have notches 16 cut or formed therein. receiving pins l? which are secured to or formed in tcgrnl with a Frame 18 having side members 19 and Q0, and a top plate 9i secured to the frame by screws These members 1?.) and 20 form guides for a sliding frame 23 which is slidahly mounted at one side in an angular groove 24. in the member 19 and has an angular groove 25 in its other side the sides of wiich groove engage the member '20 as shown in Fig. 5. This frame has a sighting member 26 inset in it as shown. iilhe frame 23 has a lengthwise extending threaded bore 9.7 receiving a, threaded rod 52% which is journalod at its lower end in the base of the frame 18 and carries a collar and a knurled head 30 at its upper end. the plate 21 being interposed between the coilar 29 and head 30, the rod passing through said plate. With this oonsi' luniion "the turning of the rod 28 in the proper direction ,will raise or lower the frame 23 with respect to the frame 18 so that against the barrel this member the sighting member 26 may he set in the desired position.

A small lug 31 projects si'mm the lower portion of the -frame 1S and; engages the spring leaf 13 adjacent the pivot and in this way the rear sight may he i 7 in upright position as shown in full 2 in Fig. 1 or it may he turned down into i. izontal posi tion as shown in dotted linin ig. 1. The frame 13 is secured to the no member be fore said member is attached to the barrel by slipping the pins 17 into the notches 16 while the spring is pres outwardly. The frame 18 also has a V secured to or formed integral with its lower end and projecting rearwardiy therefrom and provided with the usual f-notch 33 so that when the rear sight is turned down 32 is used for sighting at close or point blank range, the plate 21 having a notch 21' cut therein so as not to interfere with the use of the mem- Joer 32-. The sighting member 26 has an opening therein providing finding fields 27. a centrally disposed depending part 2-8 and a centrally disposed h'qiotch 29. Contrary to usual practice the ii-notch 2%)" is not used to determine the elevation but is used to center up the sight with tin Front sight while the pointed part 9.8 cooperates with the front sight to obtain the correct elevation without excluding the object aimed at.

The front sight consists of a base member 34 oi usual construction and two leaves 35 36 secured to said base and having'thw o and ahutting sides forming center lint- 39. more clearly mark oii' this center A rear edges 39 and h, oi the leaves are nevclcd inwardly h form a ifinotch 45 which however does not extend to the outer sides oi? the leaves out meets straight horiirontal surfaces 42 whit "prevent blurring. (if course t e leaves and 36 might be made in one piece. but easier to main them separate and join them to the hase.

The sights thus Formed ci'iiinerate in the Following manner: To o1. obicct. the oh iect is hrmight within the iiolds 2i and the front sight lined up with the rear sight o}; bringing lino 3R into position to hisect the notch 41, hat is the line 38 extends vertically trom the apex of the notch 41. With the parts thus in line the proper elevation is obtained by hringing the point 28 down to a position Where it touches a sighting member 32 viti'fi the center line 38 to in a line on the,

Hlimwiil lino sighted across tho snrlaoos 43; that tho ti 'i 28', and snr'i'ar'i-s i2 aro brought; into lino with oaoh other To provido for shooting at ditl'oront rangos tho roar sighting inonihor 2t; is raisod and ioii'orod :1:- PIt'YhHIStV dosr-rihod and pro-- ridod with an indir-at'ing mark 43' in lino with tho tip of tilt' point 28' and rotiperating with a rango scale it on tho 1111 1111101 20. For lino adjnstnwnt thoplato 21 is providod with a swalo i5 and tho hoad with a pointer iti.

From tho 'i'orogoing dosoription it; will no notod that when tho sights al'o linod up thonaro sighting tit-ids on hot l1 sitlos oi tho oontor so that tho obit-ct is piainlv visihlo and that tho sigliiing olonionts oi tho roa and front; sights aro thoinsoivos spam-d apart whon ln'onght Into propor position so that tho ohjioot ran ho (-ioariy soon. hot'h oi which foatnrus provido t'or quirk and aronrato sighting.

What i ('laiin as my iliVti'ltiUi] i Tho (Uli'liiiiitlliUil of a i'ront sight ha\'- ing a 'iflnotrh and a roarsight having an o ioning through \'l1i :h tllt i'ront: sight is Yisilil and with said notrh to (ltltililiiit' tho sighting oioration without oxrinrling tho ohjoot 'i'roni riow.

Tho oon1l1ina1io11 ot' a front sight having a E Iiflli'li and a roar sight having an opt-hing through whi -h tho 't'ront sight is risihl and a doponding pointor wriporating with said notoh to dorrrmino tho sighting oioi'ation h hringing tho tip of said pointer into lino with a lino passing through tho haso oi tho notch whorol r said sights al'o s 'iaood :l'l'om oaoh othor to givo a cloar View of the object.

3. 'iho combination of a front sight having a V-noloh and a roar sight having a ilon'naardlv projooting point oooporating with said notrh to dotormino tho sighting "oloi'atioin and -o 'iporating moans on said liiights lot lining thoin up.

Th s IUI'HlHlitttl'Hi t -1 front sight hava doponding pointoi' ooiiporating ing a V-11otrh and a oont'or lino liisooting tho :IIK'X of said notrh. and a roar sight having a V-noh-h rooporat ing wit h said oontol' line for lining up said sights, and ootipo'rating moans on said sights tor dotorinining tho oiovation.

.7. Thu combination of a l'rontsight ha\'- ing a V-notvh and a rontor lino hisocling tho ttlltX of said notrh. and a roar sight having a V-notrh and a. dolionding projortion cont-rally disposed and spin-ml l'roin oarh other and (hiding fiolds. said rontor-iino of tho t'ront sight ooii|1orating with tho V-not h of tho roar sight. to lino up said sights in a horizontal piano and sald V-notrh of tho 'i'ront sight room-rating with said projootion to (l('tt]'|lliii( tho olovation of sight.

6. Tho (OlllbilitltlOll 'ot a front sight and a roar sight. moporating nioanS on tho sights for lining thoni np.'a11d voiiporating means to dotorinino tho olovation oi. sight without oxvlnding vision of tho part of the Object aimed at. r

T. The ron'ihination oi a front; sight and a roar sight. ('oiiporating nloans on tho sights i'or lining tin-n1 up. and cooperating moans on tho sights to dotorinino tho olovation of sight without oxolnding vision oi tho part of tho obit-rt, aimod at, said rear sight also inning iinding fields on oaoh sido of tho lino of sight to pvrniit a viow of tho object aimod at.

S. A front sight providod with a ccntor lino and a. V-shapod notoh hisooting said ('llliiOl' lino at the roar portion of said sight, onoot tho roar portions oi tho sight adjaoont tho (-ontor lino oxtonding beyond tho othor to rioarlv doiino said contor line.

9. A front sight providod with a oentzor line a V shapod notch hisooting said oentor lino at tho roar portion oi. said sight and straight snriaoos oxtonding latoally from tho haso oi said notch to provont blurring.

In tostiinony whorooi', I aiiiX my signatnro.

I i ERMA N :1. FRENSDORF. 

